First off, eschatology (the study of last things) is rarely subject to a definitive answer, because there is simply a wide range of opinion on how to interpret these things. The best that I can do is repeat theories I have seen before. The answer below presumes a pre-milennial dispensationalist reading, meaning that the timeline is what Tim LaHaye popularized in the Left Behind series / the dispensationalist view promulgated by Charles Ryrie / Darby / Chafee / etc. I'm going to restrict myself to the biblical references, however, so bear in mind this isn't the answer, but rather an answer.
In Revelation 20, the devil is cast into a pit for 1000 years. At the end of that time, he and cohorts are released to see whom they can deceive - and the speculation is that those who were born during this milennium will compose a portion of that deceived cohort. The idea that there would be new people who could be believed presupposes then, that new people are someone born in the milennium. This isn't heaven, but being a different "dispensation," it is nonetheless suggestive that reproduction continues.
The theory would then be extended to suggest that if in this age there are new people, then there would be nothing to suggest that heaven would be different.
Genesis 1:22 / Genesis 9:7
In the beginning of creation, the first injuction was that man should continue God's creative work by "be[ing] fruitful and multiply[ing]". After the Flood - the end of the first "dispensation" and the beginning of the second, this injunction is repeated. Clearly in the remaining periods ("dispensations") the injunction continues, so the proof of "procreation stops in heaven" would be on the one making the claim.
Speaking of the end times,
Never again will there be in it an infant who lives but a few days, or an old man who does not live out his years; he who dies at a hundred will be thought a mere youth; he who fails to reach a hundred will be considered accursed.
and continuing into verse 24
They will not labor in vain,
nor will they bear children doomed to misfortune;
for they will be a people blessed by the LORD
This seems to suggest that these blessed people who's children live a very, very long time will be having children. One could question if this is heaven, but again, some people will apply it that way.
Here the implication is that (a) there are infants and even (b) death.
1 Corinthians 13:11-12
What we can say with a little more assurance (and here I'm leaving dispensationalism behind) is that in heaven, "We shall know fully, even as I am fully known." In other words, the closeness reserved for earthly marriage (which as you pointed out doesn't exist in heaven) is the level of intimacy we all will have in heaven*. As a present progressive, there seems to be an implication that we will be continually knowing and growing, which to me would imply new people to be known by. And, in the absence of sin, we would be able to know people much more fully than now
*(One could ask, does that mean you can have sex with anyone you want in heaven, and since there is no shame in it, you could at least make a case. I'm not suggesting anything, just pointing out how speculative eschatology gets!).
So, is this a definitive "Yes?" No. It is a speculative theology hopefully just extending existing theology. In the end, my only guess is that all of heaven is "exceedingly, abundantly, more than we could ever ask or imagine." (Eph 3:20.) That's theology I can support!